Cleaned up DMA port handling and minor tweaks
This commit is contained in:
Jeff Parsons
jeffpar
parent
b063387357
commit
158cc65da3
16 changed files with 453 additions and 175 deletions
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@ -1,6 +1,6 @@
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;
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; ROM BIOS for Compaq DeskPro 386-16
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; Rev J.4, from parts 109592-001 and 109591-001, dated 1988-Jan-28
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; Rev J.4, from parts 109592-001 and 109591-001, dated '01/28/88'
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; (C)Copyright COMPAQ Computer Corporation 1982,83,84,85,86,87-All rights reserved.
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;
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; Listing produced by NDISASM, 2015-Apr-04
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@ -2287,7 +2287,7 @@ x9311: cmp ah,al ; 00009311 3AE0 ':.'
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db 0x0D,0x0A,'Non-System disk or disk error',0x0D,0x0A,'replace and strike any key when ready',0x0D,0x0A,'$',0x0D,0x0A,'602-Diskette Boot Record Error',0x0D,0x0A,'$'
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mov bx,0x2 ; 00009380 BB0200 '...'
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x9380: mov bx,0x2 ; 00009380 BB0200 '...'
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mov cx,0xfde8 ; 00009383 B9E8FD '...'
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x9386: mov al,0x80 ; 00009386 B080 '..'
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out 0x70,al ; 00009388 E670 '.p'
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@ -2968,6 +2968,9 @@ x9bed: mov al,ah ; 00009BED 8AC4 '..'
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loop x9bed ; 00009BF6 E2F5 '..'
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jmp bp ; 00009BF8 FFE5 '..'
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;
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; Clear the screen (DS=F000, BX=BA77 for CGA or BA86 for Mono)
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;
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x9bfa: mov ax,0x720 ; 00009BFA B82007 '. .'
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mov es,[bx+0x6] ; 00009BFD 8E4706 '.G.'
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xor di,di ; 00009C00 33FF '3.'
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@ -4619,7 +4622,7 @@ xa9e9: cs rep movsw ; 0000A9E9 F32EA5 '...'
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and byte [0x87],0xfb ; 0000AA17 80268700FB '.&...'
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jmp short xaa2f ; 0000AA1C EB11 '..'
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xaa1e: mov bx,0xba77 ; 0000AA1E BB77BA '.w.'
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xaa1e: mov bx,xba77 ; 0000AA1E BB77BA '.w.'
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mov es,[cs:bx+0x6] ; 0000AA21 2E8E4706 '..G.'
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call x9e1c ; 0000AA25 E8F4F3 '...'
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jz xaa2f ; 0000AA28 7405 't.'
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@ -4744,7 +4747,7 @@ xaac9: and byte [0x10],0xcf ; 0000AAC9 80261000CF '.&...'
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call xc791 ; 0000AB1B E8731C '.s.'
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xab1e: ret ; 0000AB1E C3 '.'
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xab1f: mov dx,0xba77 ; 0000AB1F BA77BA '.w.'
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xab1f: mov dx,xba77 ; 0000AB1F BA77BA '.w.'
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mov bx,dx ; 0000AB22 8BDA '..'
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add bx,byte +0xf ; 0000AB24 83C30F '...'
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or al,al ; 0000AB27 0AC0 0x0A,'.'
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@ -4807,7 +4810,7 @@ xab96: mov al,0x58 ; 0000AB96 B058 '.X'
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out 0x84,al ; 0000AB98 E684 '..'
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push cs ; 0000AB9A 0E '.'
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pop ds ; 0000AB9B 1F '.'
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mov bx,0xba77 ; 0000AB9C BB77BA '.w.'
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mov bx,xba77 ; 0000AB9C BB77BA '.w.'
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xab9f: mov al,0x59 ; 0000AB9F B059 '.Y'
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out 0x84,al ; 0000ABA1 E684 '..'
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mov es,[bx+0x6] ; 0000ABA3 8E4706 '.G.'
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@ -6103,23 +6106,30 @@ xb68a: stc ; 0000B68A F9 '.'
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db ' 605-Diskette Drive Type Error-(Run Setup)',0x0D,0x0A
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db ' Insert DIAGNOSTIC diskette in Drive A:',0x0D,0x0A
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db 0xD8 ; 0000BA77 D8
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add dx,sp ; 0000BA78 03D4 '..'
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sub [si+0xf0],si ; 0000BA7A 29B4F000 ')...'
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mov ax,0x6000 ; 0000BA7E B80060 '..`'
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mov dh,[bx+0x1e] ; 0000BA81 8AB71E00 '....'
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inc ax ; 0000BA85 40 '@'
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mov ax,0xb403 ; 0000BA86 B803B4 '...'
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sub sp,dx ; 0000BA89 29D4 ').'
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lock add [bx+si+0x6000],dh ; 0000BA8B F000B00060 '....`'
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imul si,[bx+0x21],word 0xbd10; 0000BA90 69B7210010BD 'i.!...'
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wait ; 0000BA96 9B '.'
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mov dx,0xe5e9 ; 0000BA97 BAE9E5 '...'
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fdiv dword [bx+si+0xe68e] ; 0000BA9A D8B08EE6 '....'
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jo xbad3 ; 0000BA9E 7033 'p3'
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shl dh,0x71 ; 0000BAA0 C0E671 '..q'
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mov al,0x40 ; 0000BAA3 B040 '.@'
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out 0x86,al ; 0000BAA5 E686 '..'
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;
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; Video card data
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;
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xba77: dw 0x03D8 ; 0000BA77 D803 ; +0x00: I/O address of Mode Select Register (CGA)
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db 0xD4,0x29,0xB4,0xF0 ; 0000BA79 D429B4F0
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dw 0xB800 ; 0000BA7D 00B8 ; +0x06: real-mode segment of frame buffer
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db 0x00,0x60,0x8A,0xB7 ; 0000BA7F 00608AB7
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db 0x1E,0x00,0x40 ; 0000BA83 1E0040
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xba86: dw 0x03B8 ; 0000BA86 B803 ; +0x00: I/O address of Mode Select Register (Mono)
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db 0xB4,0x29,0xD4,0xF0 ; 0000BA88 B429D4F0
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dw 0xB000 ; 0000BA8C 00B0 ; +0x06: real-mode segment of frame buffer
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db 0x00,0x60,0x69,0xB7 ; 0000BA8E 006069B7
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db 0x21,0x00,0x10 ; 0000BA92 210010
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mov bp,0xba9b ; 0000BA95 BD9BBA
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jmp x9380 ; 0000BA98 E9E5D8
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mov al,0x8e ; 0000BA9B B08E
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out 0x70,al ; 0000BA9D E670
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xor ax,ax ; 0000BA9F 33C0
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out 0x71,al ; 0000BAA1 E671
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mov al,0x40 ; 0000BAA3 B040
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out 0x86,al ; 0000BAA5 E686
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xbaa7: cli ; 0000BAA7 FA '.'
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mov al,0xf ; 0000BAA8 B00F '..'
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@ -9921,11 +9931,15 @@ xd9db: mov ax,0x40 ; 0000D9DB B84000 '.@.'
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or bx,bx ; 0000D9ED 0BDB '..'
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jnz xd9f4 ; 0000D9EF 7503 'u.'
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jmp xda8c ; 0000D9F1 E99800 '...'
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;
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; At checkpoint 0x6B, the conventional+extended memory test has been completed, and you should
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; see a total at the top of the screen (eg, "01792 KB OK").
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;
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xd9f4: mov al,0x6b ; 0000D9F4 B06B '.k'
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out 0x84,al ; 0000D9F6 E684 '..'
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mov ax,0x1c00 ; 0000D9F8 B8001C '...'
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mov ds,ax ; 0000D9FB 8ED8 '..'
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test word [0x64],0x1 ; 0000D9FD F70664000100 '..d...'
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jz xda1b ; 0000DA03 7416 't.'
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call xc786 ; 0000DA05 E87EED '.~.'
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@ -9935,6 +9949,7 @@ xd9f4: mov al,0x6b ; 0000D9F4 B06B '.k'
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mov cl,[0x69] ; 0000DA10 8A0E6900 '..i.'
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mov dx,[0x67] ; 0000DA14 8B166700 '..g.'
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call x822d ; 0000DA18 E812A8 '...'
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xda1b: test word [0x64],0x4 ; 0000DA1B F70664000400 '..d...'
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jz xda39 ; 0000DA21 7416 't.'
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call xc786 ; 0000DA23 E860ED '.`.'
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@ -9944,6 +9959,7 @@ xda1b: test word [0x64],0x4 ; 0000DA1B F70664000400 '..d...'
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mov cl,[0x6d] ; 0000DA2E 8A0E6D00 '..m.'
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mov dx,[0x6b] ; 0000DA32 8B166B00 '..k.'
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call x8242 ; 0000DA36 E809A8 '...'
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xda39: test word [0x64],0x2 ; 0000DA39 F70664000200 '..d...'
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jz xda57 ; 0000DA3F 7416 't.'
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call xc786 ; 0000DA41 E842ED '.B.'
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@ -9952,7 +9968,13 @@ xda39: test word [0x64],0x2 ; 0000DA39 F70664000200 '..d...'
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mov si,cx ; 0000DA4A 8BF1 '..'
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mov cl,[0x71] ; 0000DA4C 8A0E7100 '..q.'
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mov dx,[0x6f] ; 0000DA50 8B166F00 '..o.'
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;
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; During the next call, the following additional text may be displayed on the screen:
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;
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; F00000 02 201-Memory Error
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;
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call x822d ; 0000DA54 E8D6A7 '...'
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xda57: test word [0x64],0x8 ; 0000DA57 F70664000800 '..d...'
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jz xda75 ; 0000DA5D 7416 't.'
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call xc786 ; 0000DA5F E824ED '.$.'
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@ -9961,7 +9983,13 @@ xda57: test word [0x64],0x8 ; 0000DA57 F70664000800 '..d...'
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mov si,cx ; 0000DA68 8BF1 '..'
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mov cl,[0x75] ; 0000DA6A 8A0E7500 '..u.'
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mov dx,[0x73] ; 0000DA6E 8B167300 '..s.'
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;
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; During the next call, the following additional text may be displayed on the screen:
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;
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; F00000 FF 203-Memory Address Error
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;
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call x8242 ; 0000DA72 E8CDA7 '...'
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xda75: test word [0x64],0x10 ; 0000DA75 F70664001000 '..d...'
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jz xda8c ; 0000DA7B 740F 't.'
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call xc786 ; 0000DA7D E806ED '...'
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@ -9969,6 +9997,7 @@ xda75: test word [0x64],0x10 ; 0000DA75 F70664001000 '..d...'
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mov bx,0xb68c ; 0000DA83 BB8CB6 '...'
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mov cx,0x1a ; 0000DA86 B91A00 '...'
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call xc745 ; 0000DA89 E8B9EC '...'
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xda8c: test word [0x64],0xffff ; 0000DA8C F7066400FFFF '..d...'
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jz xdaac ; 0000DA92 7418 't.'
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call xc786 ; 0000DA94 E8EFEC '...'
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@ -14293,6 +14322,7 @@ xffb3: pop ds ; 0000FFB3 1F '.'
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jmp 0xf000:reset ; 0000FFF0 EA05F900F0
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db ' 01/28/88'
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db 0x20
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db '01/28/88'
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db 0xFC ; 0000FFFE FC
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db 0x98 ; 0000FFFF 98
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@ -182,3 +182,229 @@ But when we stopped here next, it was no longer good:
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%00FF0740 0000 0000 0000 0000 - 0000 0000 0000 0000 ................
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Turns out this is because the A20 line has been disabled.
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-------------------------------------------------------------------------------------------------
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Let's look at a complete run:
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EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000304
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ESP=00000000 EBP=00000000 ESI=00000000 EDI=00000000
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SS=0000 DS=0000 ES=0000 FS=0000 GS=0000 PS=00000002 V0 D0 I0 T0 S0 Z0 A0 P0 C0
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F000:FFF0 EA05F900F0 JMP F000:F905
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I want to catch writes to the top-left corner of the screen, so I set a write breakpoint:
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bw b800:0
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which reports:
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write breakpoint added to memory block 000B8000
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breakpoint enabled: B800:0000 (write)
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and then we're off:
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running
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x00) @F000:F907
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x01) @F000:F926
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x02) @F000:F93C
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x03) @F000:F942
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x04) @F000:F946
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x05) @F000:F95F
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x06) @F000:F978
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x08) @F000:F9AA
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notice: PIC0(0x20): unsupported OCW2 automatic EOI command: 0x00
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stopped (149 ops, 622 cycles, 92 ms, 6761 hz)
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EAX=0000F000 EBX=00000000 ECX=00000008 EDX=00000020
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ESP=00000000 EBP=00000000 ESI=0000F8E7 EDI=00000000
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SS=0000 DS=F000 ES=0000 FS=0000 GS=0304 PS=00000046 V0 D0 I0 T0 S0 Z1 A0 P1 C0
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F000:F9ED E6A0 OUT A0,AL
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running
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notice: PIC1(0xA0): unsupported OCW2 automatic EOI command: 0x00
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stopped (150 ops, 5 cycles, 19 ms, 263 hz)
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EAX=0000F000 EBX=00000000 ECX=00000008 EDX=00000020
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ESP=00000000 EBP=00000000 ESI=0000F8E7 EDI=00000000
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SS=0000 DS=F000 ES=0000 FS=0000 GS=0304 PS=00000046 V0 D0 I0 T0 S0 Z1 A0 P1 C0
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F000:F9EF B009 MOV AL,09
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running
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x09) @F000:F9F1
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x0F) @F000:BAAA
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x10) @F000:BAFB
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bus.outPort(0x004B,unknown,0x12) @F000:BAFF
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bus.outPort(0x004B,unknown,0x42) @F000:BB03
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bus.outPort(0x004B,unknown,0x92) @F000:BB07
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x11) @F000:BB29
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x12) @F000:BB70
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breakpoint hit: B800:0000 (write)
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stopped (413 ops, 959 cycles, 80 ms, 11988 hz)
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EAX=00000720 EBX=0000BA77 ECX=00001FFF EDX=000003D8
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ESP=00000000 EBP=0000BB78 ESI=0000F0C6 EDI=00000002
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SS=0000 DS=F000 ES=B800 FS=0000 GS=0304 PS=00000046 V0 D0 I0 T0 S0 Z1 A0 P1 C0
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F000:9C05 F3 REPZ
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F000:9C06 AB STOSW
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This is where screen memory is first initialized ("blanked").
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x13) @F000:BB90
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x14) @F000:BBB8
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x15) @F000:BBD8
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x17) @F000:BC08
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x18) @F000:BC14
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x40) @F000:B552
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x2F) @0018:87B4
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x41) @F000:B572
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x42) @F000:B599
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x43) @F000:B5C4
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x44) @F000:B5D2
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x45) @F000:B600
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x43) @F000:B5C4
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x44) @F000:B5D2
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x45) @F000:B600
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x46) @F000:B61C
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x19) @F000:BC2C
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x30) @F000:A8B0
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x31) @F000:A905
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x32) @F000:A91D
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x33) @F000:A93B
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x34) @F000:A953
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x36) @F000:A991
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x38) @F000:A99C
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x39) @F000:A9BC
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bus.inPort(0x03BC,unknown) @F000:A9CA
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bus.outPort(0x03BC,unknown,0x00) @F000:A9CD
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bus.inPort(0x03BC,unknown) @F000:A9D0
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bus.inPort(0x0378,unknown) @F000:A9CA
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bus.outPort(0x0378,unknown,0x00) @F000:A9CD
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bus.inPort(0x0378,unknown) @F000:A9D0
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bus.inPort(0x0278,unknown) @F000:A9CA
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bus.outPort(0x0278,unknown,0x00) @F000:A9CD
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bus.inPort(0x0278,unknown) @F000:A9D0
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x3A) @F000:A9DE
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x3B) @F000:A9FB
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x52) @F000:AA41
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chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x53) @F000:AA54
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bus.outPort(0x03B9,unknown,0x30) @F000:9BE7
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write breakpoint added to memory block 000B8000
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write breakpoint added to memory block 000B8000
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breakpoint hit: B800:0000 (write)
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stopped (1340834 ops, 3291994 cycles, 821 ms, 4009737 hz)
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EAX=00000720 EBX=00000720 ECX=00003FFF EDX=0000B800
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ESP=000000D0 EBP=FFFF2230 ESI=00000CBA EDI=00000002
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SS=0030 DS=0000 ES=B800 FS=0000 GS=0304 PS=00000246 V0 D0 I1 T0 S0 Z1 A0 P1 C0
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C000:0E93 F3 REPZ
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C000:0E94 AB STOSW
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Now the video card's own BIOS is doing the same thing, followed by more of the same:
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write breakpoint added to memory block 000B8000
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write breakpoint added to memory block 000B8000
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breakpoint hit: B800:0000 (write)
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stopped (1384492 ops, 79242 cycles, 52 ms, 1523885 hz)
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EAX=00000720 EBX=00000720 ECX=00003FFF EDX=0000B800
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ESP=000000C8 EBP=FFFF2230 ESI=00000C3A EDI=00000002
|
||||
SS=0030 DS=0000 ES=B800 FS=0000 GS=0304 PS=00000246 V0 D0 I1 T0 S0 Z1 A0 P1 C0
|
||||
C000:0E93 F3 REPZ
|
||||
C000:0E94 AB STOSW
|
||||
running
|
||||
breakpoint hit: B800:0000 (write)
|
||||
stopped (1476959 ops, 347538 cycles, 67 ms, 5187134 hz)
|
||||
EAX=00000FDB EBX=00000FDB ECX=00000050 EDX=000003DA
|
||||
ESP=000000CC EBP=FFFF00E2 ESI=00000000 EDI=00000002
|
||||
SS=0030 DS=0000 ES=B800 FS=0000 GS=0304 PS=00000246 V0 D0 I1 T0 S0 Z1 A0 P1 C0
|
||||
C000:18D7 FB STI
|
||||
running
|
||||
write breakpoint added to memory block 000B8000
|
||||
write breakpoint added to memory block 000B8000
|
||||
breakpoint hit: B800:0000 (write)
|
||||
stopped (2824784 ops, 4644466 cycles, 528 ms, 8796337 hz)
|
||||
EAX=00000720 EBX=00000720 ECX=00003FFF EDX=0000B800
|
||||
ESP=000000C8 EBP=FFFF2230 ESI=00000CBA EDI=00000002
|
||||
SS=0030 DS=0000 ES=B800 FS=0000 GS=0304 PS=00000246 V0 D0 I1 T0 S0 Z1 A0 P1 C0
|
||||
C000:0E93 F3 REPZ
|
||||
C000:0E94 AB STOSW
|
||||
running
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x8C) @F000:D05C
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1A) @F000:BC79
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x50) @F000:AA76
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x51) @F000:AA7F
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x52) @F000:AA9C
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1B) @F000:BC80
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1C) @F000:BC87
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x90) @F000:CC53
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x91) @F000:CC85
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1D) @F000:BC8E
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x93) @F000:CC8A
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x94) @F000:CD06
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x95) @F000:CD3C
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x96) @F000:CD6A
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x2D) @F000:BC95
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x0D) @F000:E107
|
||||
bus.outPort(0x004B,unknown,0x12) @F000:E10B
|
||||
bus.outPort(0x0048,unknown,0x22) @F000:E112
|
||||
bus.outPort(0x004B,unknown,0x00) @F000:E139
|
||||
bus.inPort(0x0048,unknown) @F000:E13B
|
||||
bus.inPort(0x0048,unknown) @F000:E13E
|
||||
bus.outPort(0x004B,unknown,0x12) @F000:E11A
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x0E) @F000:E11E
|
||||
bus.outPort(0x004B,unknown,0x92) @F000:E122
|
||||
bus.outPort(0x004A,unknown,0x22) @F000:E129
|
||||
bus.outPort(0x004B,unknown,0x80) @F000:E139
|
||||
bus.inPort(0x004A,unknown) @F000:E13B
|
||||
bus.inPort(0x004A,unknown) @F000:E13E
|
||||
bus.outPort(0x004B,unknown,0x92) @F000:E131
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1E) @F000:BC9C
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x80) @F000:CFDF
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x81) @F000:CFF7
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x82) @F000:D011
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x84) @F000:D02D
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x1F) @F000:BCA3
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x75) @F000:F74D
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x76) @F000:F761
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x77) @0030:F772
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x78) @0030:F790
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x00) @F000:F907
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x07) @F000:F986
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x08) @F000:F9AA
|
||||
notice: PIC0(0x20): unsupported OCW2 automatic EOI command: 0x00
|
||||
stopped (19729382 ops, 81457037 cycles, 7165 ms, 11368742 hz)
|
||||
EAX=0000F000 EBX=00000006 ECX=00000008 EDX=00000020
|
||||
ESP=00000000 EBP=00000000 ESI=0000F8E7 EDI=00000000
|
||||
SS=0000 DS=F000 ES=0000 FS=0000 GS=0000 PS=00000046 V0 D0 I0 T0 S0 Z1 A0 P1 C0
|
||||
F000:F9ED E6A0 OUT A0,AL
|
||||
running
|
||||
notice: PIC1(0xA0): unsupported OCW2 automatic EOI command: 0x00
|
||||
stopped (19729383 ops, 5 cycles, 20 ms, 250 hz)
|
||||
EAX=0000F000 EBX=00000006 ECX=00000008 EDX=00000020
|
||||
ESP=00000000 EBP=00000000 ESI=0000F8E7 EDI=00000000
|
||||
SS=0000 DS=F000 ES=0000 FS=0000 GS=0000 PS=00000046 V0 D0 I0 T0 S0 Z1 A0 P1 C0
|
||||
F000:F9EF B009 MOV AL,09
|
||||
|
||||
We're back in the Compaq BIOS, the video card appears to be fully initialized now, so perhaps the next
|
||||
write to video memory will be the first memory test results.
|
||||
|
||||
And in fact, it is. But the "bw b800:0" command doesn't work, because the memory test results are being
|
||||
performed in protected-mode, and there is no segment 0xB800 mapped to video memory at that point.
|
||||
|
||||
So the write breakpoint must be specified as "bw %b8000" instead. Now we catch it:
|
||||
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x09) @F000:F9F1
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x79) @F000:F7CD
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x7B) @F000:F814
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x20) @F000:BCAA
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x60) @F000:D6E6
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x61) @F000:D704
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x18) @0030:870A
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x18) @0030:8715
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x62) @0030:D719
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x63) @0030:D761
|
||||
chipset.outPort(0x0084,DMA.SPARE0.PAGE,0x70) @0030:DB38
|
||||
breakpoint hit: %000B8000 (write)
|
||||
stopped (19736120 ops, 23810 cycles, 165 ms, 144303 hz)
|
||||
EAX=00000000 EBX=0000000A ECX=0000000A EDX=00000730
|
||||
ESP=000000D0 EBP=00000080 ESI=00000095 EDI=00008002
|
||||
SS=0028[00000300,FFFF] DS=0018[0001C000,FFFF] ES=0040[000B0000,FFFF]
|
||||
CS=0030[000F0000,FFFF] FS=0000[00000000,FFFF] GS=0304[00003040,FFFF]
|
||||
LD=0000[00000000,0000] GD=[0001C000,005F] ID=[000FF821,0007] TR=0000 A20=ON
|
||||
CR0=0000FFF1 CR2=00000000 CR3=00000000 PS=00000082 V0 D0 I0 T0 S1 Z0 A0 P0 C0
|
||||
0030:80DA F3 REPZ
|
||||
0030:80DB A5 MOVSW
|
||||
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@
|
|||
<rom id="romBIOS" addr="0xf8000" size="0x8000" alias="[0xf0000,0xffff0000,0xffff8000]" file="/devices/pc/bios/compaq/deskpro386/1988-01-28.json"/>
|
||||
<video ref="/devices/pc/video/video-ega-128kb-lock.xml"/>
|
||||
<keyboard ref="/devices/pc/keyboard/keyboard-minimal-functions.xml"/>
|
||||
<debugger id="debugger" messages="fault" commands=""/>
|
||||
<debugger id="debugger" messages="fault|port" commands=""/>
|
||||
<panel ref="/devices/pc/panel/btpanel.xml"/>
|
||||
<fdc ref="/disks/pc/library.xml" width="340px" automount='{A: {name: "PC-DOS 3.00 (Disk 1)", path: "/disks/pc/dos/ibm/3.00/PCDOS300-DISK1.json"}, B: {name: "PC-DOS 3.00 (Disk 2)", path: "/disks/pc/dos/ibm/3.00/PCDOS300-DISK2.json"}}'/>
|
||||
<hdc id="hdcAT" type="at" drives='[{name:"20Mb Hard Disk",type:2}]'/>
|
||||
|
|
|
|||
Loading…
Reference in a new issue